I cannot download Microsoft 365 on to my Apple MacBook Air

Tom Murray 0 Reputation points
2026-09-13T10:53:30.1633333+00:00

When I attempt to download Microsoft 365 I get an error message Error 0x0

Microsoft 365 and Office | Word | For home | MacOS
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  1. AI answer

    2026-09-13T10:53:45.4033333+00:00

    Error 0x0 on Mac is commonly tied to Office licensing or update state. The supported fix path is:

    1. Check macOS version first Microsoft’s current fix for Unknown Error 0x0 / License Not Found requires macOS 12 or later.
    2. Close all Office apps Quit Word, Excel, Outlook, PowerPoint, and OneNote completely.
    3. Update Office using Microsoft AutoUpdate Open Finder > Applications > Microsoft AutoUpdate.
      • If Microsoft AutoUpdate is not visible there, check: /Library/Application Support/Microsoft/MAU2.0/
      • Select Update All or update each Office app individually.
      • After updates finish, open an Office app again and test sign-in/download behavior.
    4. If Office was installed from the Mac App Store instead of microsoft.com Open the App Store > Updates, then update the Microsoft apps there.
    5. If the installer download itself is failing
      • Delete the downloaded installer by moving it to Trash, then empty Trash.
      • Download again using Safari from Microsoft 365 apps, then select Install apps.
      • If the download keeps failing, in Safari go to Preferences > Security and make sure Enable Javascript is selected, then go to Privacy > Manage Website Data > Remove all, and try again.
    6. If the installer downloads but will not open
      • Wait until the download is fully complete.
      • Move Microsoft Office installer.pkg from Downloads to the desktop.
      • Double-click it to launch.
      • If macOS shows an unidentified developer warning, select OK, wait 10 seconds, then hold Control and select the file on the desktop, then choose Open.
    7. If the Mac is on an older OS If the Mac is below macOS 12, Office may not install or activate correctly. In that case, use the web apps instead of the desktop apps.

    If Microsoft 365 is already installed and the error appears when opening apps, the most relevant next step is Microsoft AutoUpdate on a Mac running macOS 12 or higher.

    References:

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  2. DaveM121 930.8K Reputation points Independent Advisor
    2026-09-13T11:25:30.66+00:00

    The 0x0 error with the Office apps on an Apple Mac device is an on-going problem that may people are reporting.

    1

    What version of Microsoft Office do you have, is that a subscription to Microsoft 365 or a standalone version of Office like Office 2019, 2021 or 2024.

    2

    At the top left of your Mac desktop, click the Apple icon and select 'About this Mac', what version of MacOS is installed on your computer?

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  3. Bence Weiszmann 1,640 Reputation points
    2026-09-13T12:12:11.8733333+00:00

    Dear @Tom Murray

    Error 0x0 on Mac can have different causes depending on when the error appears.

    Could you provide a little more information?

    • Which macOS version are you using?
    • Are you trying to download the Microsoft 365 installer, or does the error appear after Office has already been installed?
    • Are you using a Microsoft 365 subscription or a standalone Office license?

    If the error is related to Office licensing, Microsoft has a specific troubleshooting article for the “Unknown Error 0x0” issue: https://support.microsoft.com/support/known-issues/unknown-error-0x0-license-not-found-error-microsoft365-macos

    You can also find general troubleshooting steps for installing or activating Microsoft 365 for Mac here: https://support.microsoft.com/microsoft-365-activation-licensing/what-to-try-if-you-can-t-install-or-activate-office-for-mac

    Best regards,
    Bence

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